They found the abandoned Chevy Caprice station wagon out past the Staples cemetery and the old Warner bridge, past the meandering Crow Wing River where the local kids go to swim on hot summer days.
It was at the end of an old logging road, surrounded by thickets of hazel and acres of swampland, the wheels partly buried in mud.
This is where Peter Achermann vanished, the day before he was to speak at his granddaughter's wedding, four long years ago.
Because they had been married more than 50 years, Delaine Achermann knows what her husband would have done if he'd gotten stuck in the mud.
"He would have spun the tires and there would be mud everywhere," Delaine said. "He would have gotten out of the car, lit a cigar. I just know what he does."
But there was no mud, no cigar stubs and no sign of Peter.
The day he disappeared, authorities began searching the area around Staples for Achermann. More than a hundred people joined the search. They used cadaver dogs, and the National Guard even got involved. They have also scanned the shallow Crow Wing River several times, and combed the swamp.
Nothing.